Happiness measure, code: A-AB-cm-mq-v-6-d

Selfreport on 5 questions:

In the past month, can you indicate how often you experienced the feelings described below?A: How often did you feel nervous? B: How often did you feel so down that nothing could cheer you up?C: How often did you feel calm and contented?D: How often did you feel down and depressed?E: How often did you feel happy?